package com.atguigu.common.valid;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import java.util.HashSet;
import java.util.Set;

public class ListValueConstraintValidator implements ConstraintValidator<ListValue,Integer> {

    private Set<Integer> set = new HashSet<>();
    //初始化方法，接口中设定的值，vals={0,1}必须
    @Override
    public void initialize(ListValue constraintAnnotation) {

        int[] vals = constraintAnnotation.vals();
        for (int val : vals) {
            set.add(val);
        }

    }

    /*
     * @param value 需要校验的值
     * @param context
     * @return
     */
    //判断是否校验成功
    @Override
    public boolean isValid(Integer value, ConstraintValidatorContext context) {
        //前端传递过来的值，开始校验
        return set.contains(value);
    }
}
